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28th International Conference on Optical Fiber Sensors, OFS 2023

作者： Almeida, Miguel A.S. de Almeida, J.M.M.M. Coelho, Luís C.C. INESC TEC Institute of Systems and Computer Engineering Technology and Science Department of Physics Faculty of Sciences University of Porto Rua do Campo Alegre Porto4169-007 Portugal Department of Physics School of Sciences and Technology University of Trás-os-Montes e Alto Douro Vila Real5001-801 Portugal

An optical fiber sensor for hydrogen detection is presented. It is based on processed fiber Bragg gratings coated with palladium thin films where its expansion due to the hydrogen adsorption is monitored as strain mea... 详细信息

ISBN: (纸本)9781957171302

关键词： Palladium

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Model Predictive Control for B-Spline Trajectory Tracking in Omnidirectional Robots

Model Predictive Control for B-Spline Trajectory Tracking in...

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Iberian Robotics Conference (ROBOT)

作者： José Pedro Carvalho António Paulo Moreira A. Pedro Aguiar Faculty of Engineering University of Porto (FEUP) Porto Portugal SYSTEC-ARISE Research Center for System and Technologies Porto Portugal INESC TEC-Institute for Systems and Computer Engineering Technology and Science Porto Portugal

ISBN: (数字)9798350376364

ISBN: (纸本)9798350376371

In the field of intelligent autonomous robots, integrating optimization techniques with classical control theory methods for mobile robot control is an increasingly prominent area of research. The combination enhances robots' ability to perform their tasks more efficiently, reliably, and safely. This paper addresses the development of a path and motion planning framework for omnidirectional robots, leveraging B-Splines and Trajectory Tracking with Model Predictive Control. The proposed framework is evaluated through software-in-the-loop tests using two distinct dynamical models and sets of hyperparameters. Final validation is conducted by implementing the framework within a ROS environment and performing field tests on a robotic platform. The results demonstrate that the robot can reliably track trajectories at its actuation limits, and the proposed framework enables the robot to increase its velocity up to 50% when compared to a PID path-following controller.

关键词： Uncertainty Trajectory tracking Wheels Predictive models Trajectory Planning Mobile robots Splines (mathematics) Robots Predictive control

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Harnessing Parasitic Cavity as Reference for Low Coherence systems

Harnessing Parasitic Cavity as Reference for Low Coherence S...

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IEEE Photonics Conference (IPC)

作者： Paulo Robalinho A. Rodrigues S. Novais A. B. Lobo Ribeiro S. Silva O. Frazão INESC TEC Institute for Systems and Computer Engineering Technology and Science Porto Portugal Department of Engineering Physics Faculty of Engineering of University of Porto Portugal Faculty of Health Sciences University Fernando Pessoa Porto Portugal

This work presents an implementation of a reference optical cavity based on parasitic cavities on a low coherence interferometric system. This method allows a maximization of the number of sensors to be implemented wi... 详细信息

ISBN: (数字)9798350361957

ISBN: (纸本)9798350361964

关键词： Optical fibers Optical interferometry Optical fiber sensors Wavelength measurement Circulators Coherence Displacement measurement Optoelectronic and photonic sensors Photonics

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Floating Music Score: System Design 22

Floating Music Score: System Design

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22nd International Conference on Computational science and Its Applications, ICCSA 2022

作者： Ferreira, Gilberto Pinheiro, Marisa Silva, J.C. School of Technology Polytechnic Institute of Cávado and Ave Barcelos Portugal Institute for Systems and Computer Engineering Inesc Tec Porto Portugal 2Ai - School of Technology Polytechnic Institute of Cávado and Ave Barcelos Portugal

ISBN: (纸本)9781665455848

This paper aims to describe an approach to create a useful and effective solution to facilitate the reading of musical scores during the performance or study of pieces, using the aid of Mixed Reality (MR), mobile devices, digital scores, and Data Musical Instrument Digital Interface (MIDI). MR can be defined as a system that combines physical objects with virtual objects. MIDI is a digital file containing musical notation information that can be interpreted by electronic devices. In this project, we aim to use HoloLens glasses and mobile devices, such as tablets or smartphones. The HoloLens are devices that can be used to create realistic holograms to visually represent the scores. The use of the various devices is intended to make the performance easier. The proposed approach aims to interpret scores in MIDI format and present them in hologram format to the MR glasses and graphical format to the mobile devices. In parallel, the system should be able to synchronize the presentation between different devices. © 2022 IEEE.

关键词： Music

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Analysis of Flexibility-centric Energy and Cross-sector Business Models

Analysis of Flexibility-centric Energy and Cross-sector Busi...

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International Conference on European Electricity Market, EEM

作者： Luís Rodrigues Diogo Faria Fábio Coelho João Mello João T. Saraiva José Villar Ricardo J. Bessa INESC TEC - Institute for Systems and Computer Engineering Technology and Science Universidade do Minho Faculdade de Engenharia da Universidade do Porto Portugal

The new energy policies adopted by the European Union are set to help in the decarbonization of the energy system. In this context, the share of Variable Renewable Energy Sources is growing, affecting electricity markets, and increasing the need for system flexibility to accommodate their volatility. For this reason, legislation and incentives are being developed to engage consumers in the power sector activities and in providing their potential flexibility in the scope of grid system services. This work identifies energy and cross-sector Business Models (BM) centered on or linked to the provision of distributed flexibility to the DSO and TSO, building on those found in previous research projects or from companies’ commercial proposals. These BM are described and classified according to the main actor. The remaining actors, their roles, the interactions among them, how value is created by the BM activities and their value propositions are also described.

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Optimized Design Methodology in Inductive Power Transfer systems Applied to Electric Vehicle Charging

Optimized Design Methodology in Inductive Power Transfer Sys...

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IEEE Annual Southern Power Electronics Conference (SPEC)

作者： Leonardo A. Brum Viera Pedro Gelati Pascoal Cassiano Rech Federal Universtity of Santa Maria (UFSM) Santa Maria RS Brazil INESC TEC - Institute of Systems and Computer Engineering Technology and Science Porto Portugal

technologies related to the transportation electrification have been gaining attention in recent years. One technology that stands out is wireless charging, which still presents numerous challenges in terms of design and optimization of parameters. This article proposes a design methodology for optimizing the performance of an inductive power transfer (IPT) for wireless charging of electric vehicles, taking into account operating limits. The proposed methodology uses a PSO (Particle Swarm Optimization) algorithm to find the design variables that maximize the eficiency. The methodology and the development of a 3.6 kW experimental setup are presented, resulting in a power transfer efficiency of 89.4 %.

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A solution for resource allocation through complex systems in fog computing for the internet of things

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Computing 2024年第7期106卷 2107-2131页

作者： Faraji, Fatimah Javadpour, Amir Sangaiah, Arun Kumar Zavieh, Hadi Department of Computer Engineering Yazd University Safaeih Yazd100190 Iran Harbin Institute of Technology Shenzhen10587 China ADiT-Lab Electrotechnics and Telecommunications Department ISMAI and INESC TEC Instituto Politécnico de Viana do Castelo ISMAI Porto10587 Portugal International Graduate School of Artificial Intelligence National Yunlin University of Science and Technology Yunlin 64002 Taiwan Department of Economic and Statistics Guangzhou Higher Education Mega Center Guangzhou University Guangzhou510006 China Department of Electrical and Computer Engineering Lebanese American University Byblos13-5053 Lebanon

To manage the IoT resources to process the massive amount of collected data in complex systems, Allocation of tasks to nodes to increase user satisfaction has been noticed by researchers. In allocating tasks, the necessity of a powerful auxiliary platform is felt. Cloud and fog networks are two suitable options for performing and completing tasks on the Internet of Things. In the cloud network, due to offloading tasks to remote computing centers, problems such as increasing complete time, increasing traffic in the network, and high energy consumption for the Internet of Things network occur. The fog network solves the problem of completing tasks due to reducing the geographical distance between Internet of Things devices and processor nodes. The devices in the fog network cooperate with the Internet of Things network’s diverse and variable nodes with time computing, storage, and processing resources. In this heterogeneous environment, the non-cooperation and dishonesty of malicious fog nodes through misrepresentation of shared resources and non-completion of tasks can disrupt the performance of the Internet of Things network. As a result, two fundamental challenges in the heterogeneous fog network include providing resources to allocate tasks and recognizing valid fog nodes. This paper focuses on creating a resource provider network to allocate tasks to authentic fog nodes with appropriate resources. When an Internet of Things node faces a shortage of resources and link prediction, it can form a resource supply network with neighboring nodes to solve the two stated challenges. For this purpose, in the first stage, efforts are made to select the most appropriate options among the neighboring nodes based on specific criteria. In the second step, reliable nodes are identified based on a trust mechanism, including resource trust and entity trust. In the last step, tasks are divided among reliable devices with sufficient resources. The evaluation of the proposed method i

关键词： Quality of service

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Simulation Environment for UAV Offshore Wind-Turbine Inspection

Simulation Environment for UAV Offshore Wind-Turbine Inspect...

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OCEANS

作者： A. Oliveira A. Dias T. Santos P. Rodrigues A. Martins E. Silva J. Almeida INESC TEC Institute for Systems and Computer Engineering Technology and Science Porto Portugal ISEP Instituto Superior de Engenharia do Porto Porto Portugal

Offshore wind farms are becoming the main alternative to fossil fuels and the future key to mitigating climate change by achieving energy sustainability. With favorable indicators in almost every environmental index, these structures operate under varying and dynamic environmental conditions, leading to efficiency losses and sudden failures. For these reasons, it’s fundamental to promote the development of autonomous solutions to monitor the health condition of the construction parts, preventing structural damage and accidents. This paper introduces a new simulation environment for testing and training autonomous inspection techniques under a more realistic offshore wind farm scenario. Combining the Gazebo simulator with ROS, this framework can include multi-robots with different sensors to operate in a customizable simulation environment regarding some external elements (fog, wind, buoyancy…). The paper also presents a use case composed of a 3D LiDAR-based technique for autonomous wind turbine inspection with UAV, including point cloud clustering, model estimation, and the preliminary results under this simulation framework using a mixed environment (offshore simulation with a real UAV platform).

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Prosumers' Participation Through Aggregators in Multi-Carrier Energy systems

Prosumers' Participation Through Aggregators in Multi-Carrie...

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Annual North-American Power Symposium

作者： Dana Marina Gálvez García Guillermo Gutierrez-Alcaraz Jose Horacio Tovar-Hernández Mohammad Sadegh Javadi Department of Electrical Engineering Tecnológico Nacional de México/I. T. Morelia Morelia Mexico Institute for Systems and Computer Engineering Technology and Science (INESC TEC) Porto Portugal

ISBN: (数字)9798331521035

ISBN: (纸本)9798331521042

In the context of the ongoing energy transition towards renewable sources and the decentralization of generation, multi-carrier energy systems emerge as a comprehensive solution that allows the synergic integration of different energy carriers, such as electricity, natural gas, heat, and storage, offering an effective response to the challenges posed by the variability of renewable generation and the fluctuation of energy demand. In addition, the inherent flexibility of these systems facilitates the management of the variability of renewable generation and adaptation to changes in energy demand, thus contributing to the stability and reliability of supply. In this context, the participation of prosumers who contribute their distributed generation and load flexibility through energy aggregators that effectively coordinate energy supply and demand in real-time ensures a constant balance in the energy system stands out. This paper explores the potential for various prosumer groups, facilitated by multi-carrier energy aggregators, to offer flexible services to electric distribution and natural gas grid utilities, given that natural gas is the prosumers' primary fuel for heating and cooking. The model is formulated as a two-level optimization problem. The upper level results in the emulation of the distribution system, while the lower level minimizes the flexible demand of prosumers. The interaction of the two levels is not through the price of electricity but through prosumer demand. The resulting optimization problem is a mixed-integer linear programming formulation. The results on the IEEE 33-bus distribution and 20-bus natural gas systems allow us to observe that the supply costs in the distribution and natural gas networks are efficiently reduced considering the coordination of prosumers' participation.

关键词： Renewable energy sources Energy consumption Costs Electricity Power system stability Propagation losses Stability analysis Natural gas Optimization Resistance heating

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Image and Command Transmission Over the 5G Network for Teleoperation of Mobile Robots

Image and Command Transmission Over the 5G Network for Teleo...

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Iberian Robotics Conference (ROBOT)

作者： Thiago B. Levin João Miguel Oliveira Ricardo B. Sousa Manuel F. Silva Bruno S. Parreira Héber Miguel Sobreira Hélio Sousa Mendonça CRIIS - Centre for Robotics in Industry and Intelligent Systems INESC TEC - Institute for Systems and Computer Engineering Technology and Science Portugal Faculty of Engineering University of Porto (FEUP) Portugal ISEP Polytechnic of Porto. Portugal NOS SGPS Portugal

ISBN: (数字)9798350376364

ISBN: (纸本)9798350376371

Human oversight can benefit scenarios with complex tasks, such as pallet docking and loading and unloading containers, beyond the current capabilities of autonomous systems without any failures. Furthermore, teleoperation systems allow remote control of mobile ground robots, especially with the surge of 5G technology that promises reliable and low latency communication. Current works research on exploring the latest features from the 5G standard, including ultra-Reliable Low-Latency Communication (uRLLC) and network slicing. However, these features may not be available depending on the Internet Service Provider (ISP) and communication devices. Thus, this work proposes a network architecture for the teleoperation of ground mobile robots in industrial environments using commercially available devices over the 5G Non-Standalone (NSA) standard. Experimental results include an evaluation of the network and End-to-End (E2E) latency of the proposed system. The results show that the proposed architecture enables teleoperation, achieving an average E2E latency of 347.19 ms.

关键词： 5G mobile communication Network slicing Web and internet services Ultra reliable low latency communication Mobile robots Reliability Surges Standards Remote control Pallets

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